Automatic stoker.



No. 880,623. PATENTED MAR. 3, 1908.

M. B. BREWSTER.

AUTOMATIC STOKER.

APPLICATION FILED JUNE 12. 1907.

4 SHEETS -SHEET 1.

INVENTOR M fa. @MNM 1 .4%

ATTORNEY PATENTED MAR. 3, 1908.

M. B.- BREWSTER. AUTOMATIC STOKER.

APPLICATION FILED JUNE 12. 1907.

4 SHEETS-SHEET 2.

ATTORNEY M. B. BREWSTER. AUTOMATIC STOKBR.

APPLICATION FILED JUNE 12, I907.

PATENTED MAR. 3

4 SHEETS-SHEET 3.

INVENTOR WITNESSES:

UNIT D STATES PATENT OFFICE.

MORRIS B. BREWSTER, OF COLUMBUS, OHIO. v

ire-880,623.

Specification of Letters Patent. v

Patented ma s, 1908.

To all whom wit may concern:

Be It known that I, MoRRIs B. BREWSTER,

Ra citizen of the United States, residing at of which 1;

keeping said distributing means cool and -also assist in the distribution.

Another feature resides in a novel feeding mechamsm carried by both the locomotive and tender and involving a novel joint and other peculiar mechanism.

Finally the object of the invention is to provide-a device of the character described that will be strong, durable and efficient and one-in which the several parts will not be liable to et out of working order.

With t e above and other objects inview,

the invention has relation to the production ractical embodi-.

of mechanical stokers, a ment of which is describe in the specification and illustrated in the accompanying drawings, wherein:

Figure 1 is a horizontal, sectional view showing a portion of the fire box and frame of a locomotive with my improved stoker applied thereto, Fi 2 is a partial longitudinal vertical sectiona view 0 a locomotive and tender and the stoker, Fig. 3 is a vertical sectional view of the connecti-n screw and its casing taken on the line A' of Fig. 2, Fig.

, 4 is a transverse'vertical section taken on the line BB of Fig. 2 and looking in the direction of the arrows, Fig. 5. is an elevation of the fire box, showing the fire door and the distributing steam connection; Fig. 6 is a lo 'tudinaLvertical section of the tender an the stoker, Fig. 7 is a transverse vertical.

section of the same, Fig. 8 is a plan view of the tender and stoker, and Fig. 9 is anenlarged detail of the tender screw and its trough.

In the drawings the numeral 1, designates the locomotive fire box or combustion chamber, and 2 the back sheets. At the lower end of the combustion chamber a central longitive.

tudinal grate bar -3' is arranged terminating atits rear end in an enlar ement 4 as shown in Fi 1 Opposite this arside bars 5 are suitably mounted. Between the bars suitable grates are pivotally mounted. These rates are arranged in four sets lettered A, i C and D and connected with suitable mechanisni hereinafter described, so that each set is operated successively and one at a time. The grates are so mounted as to swing upward and forward, acting to work the coal toward the front end of the combustion chamber.

At the forward end of the combustion chamber centrally pivoted dump grates A and Dare arranged and connected to operate in unison with the grates forming the A and D sets respectively. At the feeding end of the combustion chamber statlonary grates 8 are mounted in each corner, wh le short grates A B C and D are piv-- otedat right angles to the other grates and arranged to swing upward and toward the sides of the combustion chamber, being connected to operate in unison with the sets bearing the same respective letter. It is obvious that-fuel delivered to the combustionchamber will be carried to each side and forward by-the grates, and after combustion dumped by the grates A and D into the ash-pan. (Not shown.)

In Figs. 6, 7, 8 and 9 I have shown'a ten-' der body formed with a hopper 10 terminatmg in a central longitudinal screw or consaid section 17 being ormed at its outer end with a ball 18 fitting in the bowl end 19 of a conveyer trough 20 carried by thelocomo- In this way universal joints are provided between thetroughs, the connecting trough being made as described in telescoping sections, so that play betweenthe loco-, motive and tenderin all directions is afford:- ed. In the connecting trough a screw 21' is mounted. This screw receives separable squared shafts 22 and. 23 which are connected,

one to the screw 12 by a clevis 24, and the improved conveyer may be likewise coupled or uncoupled by means of the clevises 24 and 6, the section formed by squared shafts 22 and 23 and the screw 21 being turned up at one end when disconnected at the other as shown in dotted lines in Fig. 2. The screws 21 and 25 extend under the deck 27 of the locomotive and a hinged cover 28, of the telescope-sections 17 and 17. The trough terminates in a vertical screw casing'29 beneath the combustion chamber, the said casing passing up through the rate bar enlargement 4 and terminating fush with the surface thereof. In this casing a vertical screw 30 isarranged and projects a short distance above the enlargement and the grate line. It will be apparent that motion being im arted to the screws, the fuel will be conveye forward, u through the casing and scattered in the com ustion chamber by the screw 30, the grates operating to distribute and carry the fuel forward, aspreviously described.

It is obvious that owing to the intense heat the vertical screw 30 would become so hot, being exposed to the fire, as to become soft and useless. To prevent this the center of the screw is hollow and its upper end closed. Steam supplied to the screw is ejected through. perforations 31 which not only maintains the temperature of the screw at a low degree of heat but assists in scattering the fuel. The steam is supplied in any suit able manner, as by a ipe'32 (see Fig. 5) having connection with t e exhaust of asuitable engine which is used to drive the gearing hereinafter described. This pi e 32 is telescopingly disposed at its en within the lower end 33 of the hollow vertical shaft of the screw, 30.

I-will now describe the mechanism for imparting motion to the various screws. A drive shaft 35 is supported from the outer sheet 2 in bearings 36, andextends transversely across the locomotive, carrying on its end a miter gear 37 and near this gear a worm 38. This worm meshes with a worm 1 wheel 39 having a clutch side and loosely The counter shaft-41 also carries a spur gear drive shaft 35.

mounted on a counter shaft 40 lying beneath and suitably supported at right an les to the The clutch face 0 this gear 39 is adapted to be engaged by a clutch member 41 by which the imparting of motion to the counter shaft may be controlled.

upper end of a suitably supported inclined shaft 45, which carries near its lower end a worm 46. This worm meshes with a worm wheel 47 mounted on the end of a short transverse shaft 48 supported below the screw casing '29 in a de ending arm 49 of said screw casing 29, w ich arm provides at its lower end a bearing 50 for the lower end of the inclinedv shaft 45. The short shaft 48 carries on its opposite end a miter gear 51 which meshes with a miter gear 52 fixed on the lower portion 33 of the shaft of the-vertical screw 30 as shown in Fig. 4.

Intermediate its ends, the inclined shaft 45 carries a worm 53 which meshes with a worm wheel 54 carried on a transverse shaft 55-mounted in bearings between the longitudinal supporting brackets 56 which further support a transverse shaft 57 in parallelism with said shaft 55. The shaft 55 carries a pair of double cams 58 which operate against the vertical levers 59, swingmgly mounted on the parallel shaft 57, (as shown clearly in Fig. 2) and actuate the horizontal levers 60, ivotallyconnected at the upper ends of sald levers 59-, to rock the sets of rates A, B, Q and D as dpreviously described, by means of the indivi ual grate connecting levers 61. The vertical levers 59, in their movement, are arranged to strike and operate bell-cranklevers 62, mounted on short shafts 63 depending from the fire box 1, to

similarly actuate the short grates A B C and D asdescribed, by means of their individual connecting levers 64.

Projectin within the fire box 1 at the upper end of t e vertical screw 30 I preferably arranged a plurality of distributing nozzles 65 extending from a manifold 66 and adapted'to emit an intermittently regulated su plyof fluid under pressure to assist in t e more perfect distribution of the coal within I the fire box 1. The manifold 66 has connection with a valve cylinder 67 by means of a ipe 68, said valve cylinder having a fluid inet pipe 69 connected thereto and having arranged therein a double headed piston 70 continuously reciprocated to alternately cut-off and open the mouth of the manifold pipe 68, by means of a strap or other eccentric 71 mounted either on the drive shaft 35,

or on some other suitably rotating element.

Having thus fully described my invention I claim:

1., .The combination with a locomotive and its tender having a fuel conveyer provided with a removable section universally jointed therein between the cars, of a fire box having movable grates, means for d1 s tributing the fuel from said conveyer to said grates, and mechanism for simultaneously operating said conveyer and grates, substan tially as described.

2. The combination with a locomotive and its tender having an extensible removfor simultaneously operating said conveyer and grates, substantially as described.

3. The combination with a locomotive and its tender having a separable fuel conveyer rovided with a removable section uni- .versal y jointed therein between the cars, of a firebox having movable grates, means for distributing the fuel from said conveyer to said grates, and mechanism for operating said conveyer, said distributing means, and said grates, substantially as described.

4. The combination with a locomotive and its tender having a separable fuel conveyer provided with an extensible removable section universally jointed therein between the'cars, of a fire box having movable grates,

means for distributing the fuel from said conveyer to said grates, and mechanism for simultaneously operating said conveyer, said distributing means, and said grates, sub- 'stantially as described.

5. The combination m a device of the character described, of a locomotive and its tender and a conveyer for delivering fuel from said tender to said locomotive, and having a 3 o removable section, universally jointed therein between the cars, substantially as described.

6. The combination of a device of the character described, of a locomotive and its tender and a conveyer for delivering fuel from said tender to said locomotive, and having an extensible removable section, universally jointed therein between the cars, substantially as described.

7. The combination with a locomotive and its tender having a separable universally jointed fuel conveyer arranged therebetween, of a fire box, a fuel conveyer projecting therein to deliver the fuel and having a perforated tubular member, and means for forcing a fluid therethrough, substantially as described.

8. Inapparatus of the character described, a conveyer for introducing fuel into a combustion chamber, said conveyer being adapt ed and arranged to elevate said fuel ap roximatel'y vertically into said chamber and having a hollow perforated shaft, intermittent fluid pressure means for distributing said elevated fuel in said chamber, and means for forcing a fluid through said shaft to cool the same and said conveyer and assist in the distribution of the fuel, substantially as described.

9. In an apparatus of the character described, means for conveying fuel from a tender to a locomotive, a screw conveyer in combination with said conveying means, said screw conveyer being adapted and arranged to elevate said fuel'upwardly through the base of the locomotive fire box, and having a hollow perforated shaft, intermittent fluid pressure means for distributing the fuel in said fire box, and means for forcing a fluid through said shaft to cool the same and said screw conveyer and assist in the distribution of the fuel, substantially as described.

10. The combination with a locomotive and its tender having a fuel conveyer arranged to deliver fuel from said tender to said locomotive and having an extensible, removable section universally hinged therein between the cars, means for distributing the fuel-from said conveyer to said grates, and mechanism for simultaneously operating said conveyer, said distributing means and said grates, substantially as described.

in testimony whereof I affix my signature in presence of two witnesses.

MORRIS B. BREWSTER.

Witnesses:

L. CARL STOUGHTON. A. L. PHELPS. 

